Cylinder structure and oil mist catcher

The utility model provides a cylinder body structure and an oil mist catcher. The cylinder body structure comprises an oil storage cylinder body, a main cylinder body and a connector assembly which are sequentially connected in a sealed mode. An air inlet cavity and a trapping cavity are sequentially formed in the main cylinder body. And the flow guide part is arranged between the gas inlet cavityand the trapping cavity, and the flow guide part is used for equalizing the flow of gas flowing into the gas inlet cavity, so that the gas uniformly flows into the trapping cavity. According to the cylinder body structure, the flow guide piece is arranged between the trapping cavity and the air inlet cavity, so that air is in uniform contact with the condensation assembly, and the problem of lowtrapping efficiency caused by non-uniform air flow distribution is solved. The air inlet cavity and the liquid storage cavity are provided with the air isolation pieces, it is guaranteed that liquid oil can be smoothly collect